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Open AccessArticle

The Effects of the Addition of Ti3SiC2 on the Microstructure and Properties of Laser Cladding Composite Coatings

by Qin Shi 1,2, Hejun Zhu 1 and Changsheng Li 1,2,*
1
School of Mechanical Engineering, Zhenjiang Vocational Technical College, Shaoxing 312099, China
2
School of Mechanical Engineering, Jiangsu University, 301, Xuefu Road, Zhenjiang 212013, China
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(5), 498; https://doi.org/10.3390/coatings10050498
Received: 10 April 2020 / Revised: 1 May 2020 / Accepted: 7 May 2020 / Published: 22 May 2020
This study explored the effects of Ti3SiC2 on the microstructure and properties of laser cladding coatings using X-ray diffractometer, scanning electron microscope, electrochemical workstation, and UMT-2 wear tester analyses. It was found that with the addition of Ti3SiC2, the reinforcing phases in the composite coating were TiC, Ti(B,C)2, honeycomb-like (Cr, Fe)23C6, and a novel composite ceramic with an “eyeball” structure, which had an inside core of Al2O3 and TiC outer surrounding structure. The microhardness, wear, and corrosion resistance of the composite coating were about 1.35, 2, and 4.3 times those of the original coating, respectively. The main wear mechanisms of the original coating were severe fatigue spalling and microcutting, while the main mechanisms of the composite coating were slight microcutting and the formation of the transferred film. View Full-Text
Keywords: Ti3SiC2; composite ceramics; wear and corrosion resistance Ti3SiC2; composite ceramics; wear and corrosion resistance
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Shi, Q.; Zhu, H.; Li, C. The Effects of the Addition of Ti3SiC2 on the Microstructure and Properties of Laser Cladding Composite Coatings. Coatings 2020, 10, 498.

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